B57236S0309M000

NTC thermistors for inrush current limiting Leaded and coated disks Series/Type: B57236S0***M0** Date: November 2015 © EPCOS AG 2015. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without EPCOS' prior express consent is prohibited. EPCOS AG is a TDK Group Company. Inrush current limiters B57236S0***M0** ICLs S236 Applications Inrush current limiting, e.g. in switch-mode power supplies, soft-start motors Dimensional drawing Features Leaded and coated NTC thermistors Tinned copper wire, kinked Coating material flame retardant to UL 94 V-0 Component marking includes the manufacturer's logo, resistance value and date code Highly stable electrical characteristics Approvals UL 1434 (file number E69802) IEC (certificate number 101QA12) VDE (certificate number 40038223) CQC (0900104539) Dimensions in mm Approx. weight 1 g Options Resistance tolerance 25 °C Tmax = 170 °C Derating curve for types S153, S235, S236, S238, S364 and S464 Figure 2 Please read Cautions and warnings and Important notes at the end of this document. Page 8 of 21 Inrush current limiters B57236S0***M0** ICLs S236 TA = Ambient temperature > 65 °C Tmax = 170 °C The Imax values specified in the data sheets denote the maximum permissible continuous current (DC or RMS values for sine-shaped AC) in the temperature range 0 °C to 65 °C. 1.6 Maximum permissible capacitance The currents during turn-on are much higher than the rated currents during continuous operation. To test the effects of these current surges EPCOS uses the following standard procedure according to IEC 60539-1: Figure 3 Test circuit for evaluating the maximum permissible capacitance of an NTC thermistor Vload Load voltage [V] Ctest Test capacitance [µF] RS Series resistance [RS = 1 Ω] VNTC Voltage drop across the NTC under test [V] The capacitor Ctest is discharged via the series resistor RS and the NTC inrush current limiter. The load voltage is chosen such that the voltage applied to the thermistor at the start of discharge is VNTC = 375 V (corresponds to (230 V + ∆V)  2). Please read Cautions and warnings and Important notes at the end of this document. Page 9 of 21 Inrush current limiters B57236S0***M0** ICLs S236 Figure 4 Maximum permissible capacitance discharging test: typical curves The maximum capacitances that can be switched depend on the individual thermistor type and are given in the data sheets. Please read Cautions and warnings and Important notes at the end of this document. Page 10 of 21 Inrush current limiters B57236S0***M0** ICLs S236 Taping and packing 1 Taping of radial leaded ICL NTC thermistors according to the specified lead spacing Dimensions and tolerances Lead spacing F = 5.0 mm (taping to IEC 60286-2) for the following types: S153, S235 and S236 Lead spacing F = 7.5 mm (taping based on IEC 60286-2) for the following types: P11, P13, S237, S238 and S364 Please read Cautions and warnings and Important notes at the end of this document. Page 11 of 21 Inrush current limiters B57236S0***M0** ICLs S236 Dimensions (mm) Lead spacing 5 mm Tolerance of lead spacing 5 mm Lead spacing 7.5 mm Tolerance of lead spacing 7.5 mm ≥12.0 Remarks w ≤12.0 th 6.0 max. 7 max. please refer to dimensional drawings d 0.5/0.6 ±0.05 0.8/1.0 ±0.05 please refer to dimensional drawings P0 12.7 ±0.3 12.7 ±0.3 ±1 mm / 20 sprocket holes P1 3.85 ±0.7 8.95 ±0.8 F 5.0 +0.6/0.1 7.5 ±0.8 ∆h 0 ±2.0 0 ∆p 0 ±1.3 0 ±2.0 W 18.0 ±0.5 18.0 ±0.5 W0 5.5 min. 11.0 min. W1 9.0 +0.75/0.5 9.0 +0.75/0.5 please refer to dimensional drawings Depends on th measured at top of component body W2 3.0 max. 3.0 max. H 18.0 +2.0/0 18.0 +2.0/0 H0 16.0 ±0.5 16.0 ±0.5 H1 32.2 max. 45.0 max. D0 4.0 ±0.2 4.0 ±0.2 t 0.9 max. 0.9 max. L 11.0 max. 11.0 max. L1 4.0 max. 4.0 max. Please read Cautions and warnings and Important notes at the end of this document. Page 12 of 21 peel-off force ≥5 N applies only to uncrimped types applies only to crimped types without wires Inrush current limiters B57236S0***M0** ICLs S236 Types of packing Reel packing Reel dimensions (in mm) Reel type Series pcs. per reel d f n w I S153, S235 1500 360 max. 31 ±1 approx. 45 54 max. I S236 1000 360 max. 31 ±1 approx. 45 54 max. II P11, P13 1500 500 max. 23 ±1 approx. 59 72 max. II S237, S238, S364 1000 500 max. 23 ±1 approx. 59 72 max. Ammo packing Ammo Series type pcs. per x package y z I S153, S235, S236 1000 45 335 272 II P11, P13, S237, S238, S364 750 55 340 340 Ammo packing dimensions (in mm) Bulk packing The components are packed in cardboard boxes, the size of which depends on the order quantity. Series S464 and P27 is only available as bulk. Please read Cautions and warnings and Important notes at the end of this document. Page 13 of 21 Inrush current limiters B57236S0***M0** ICLs S236 Mounting instructions 1 Soldering 1.1 Leaded NTC thermistors Leaded thermistors comply with the solderability requirements specified by CECC. When soldering, care must be taken that the NTC thermistors are not damaged by excessive heat. The following maximum temperatures, maximum time spans and minimum distances have to be observed: Dip soldering Iron soldering Bath temperature max. 260 °C max. 360 °C Soldering time max. 4 s max. 2 s Distance from thermistor min. 6 mm min. 6 mm Under more severe soldering conditions the resistance may change. Solderability (test to IEC 60068-2-20) Preconditioning: Immersion into flux F-SW 32. Evaluation criterion: Wetting of soldering areas ≥95%. Solder Bath temperature (°C) Dwell time (s) SnAg (3.0 ... 4.0), Cu (0.5 ... 0.9) 245 ±3 3 1.1.1 Resistance to soldering heat (test to IEC 60068-2-20) Preconditioning: Immersion into flux F-SW 32. Solder Bath temperature (°C) Dwell time (s) SnAg (3.0 ... 4.0), Cu (0.5 ... 0.9) 260 5 10 Please read Cautions and warnings and Important notes at the end of this document. Page 14 of 21 Inrush current limiters B57236S0***M0** ICLs 1.1.2 S236 Wave soldering Temperature characteristic at component terminal with dual wave soldering 2 Robustness of terminations The leads meet the requirements of IEC 60068-2-21. They may not be bent closer than 4 mm from the solder joint on the thermistor body or from the point at which they leave the feedthroughs. During bending, any mechanical stress at the outlet of the leads must be removed. The bending radius should be at least 0.75 mm. Tensile strength: Test Ua1: Leads 0.50 < ∅ ≤0.80 mm = 10.0 N 0.80 < ∅ ≤1.25 mm = 20.0 N Bending strength: Test Ub: Two 90°-bends in opposite directions at a weight of 0.25 kg. Torsional strength: Test Uc: severity 2 The lead is bent by 90° at a distance of 6 to 6.5 mm from the thermistor body. The bending radius of the leads should be approx. 0.75 mm. Two torsions of 180° each (severity 2). Please read Cautions and warnings and Important notes at the end of this document. Page 15 of 21 Inrush current limiters B57236S0***M0** ICLs S236 When subjecting leads to mechanical stress, the following should be observed: Tensile stress on leads During mounting and operation tensile forces on the leads are to be avoided. Bending of leads Bending of the leads directly on the thermistor body is not permissible. A lead may be bent at a minimum distance of twice the wire's diameter +2 mm from the solder joint on the thermistor body. During bending the wire must be mechanically relieved at its outlet. The bending radius should be at least 0.75 mm. Twisting of leads The twisting (torsion) by 180° of a lead bent by 90° is permissible at 6 mm from the bottom of the thermistor body. 3 Sealing and potting When thermistors are sealed, potted or overmolded, there must be no mechanical stress caused by thermal expansion during the production process (curing / overmolding process) and during later operation. The upper category temperature of the thermistor must not be exceeded. Ensure that the materials used (sealing / potting compound and plastic material) are chemically neutral. 4 Cleaning If cleaning is necessary, mild cleaning agents such as ethyl alcohol and cleaning gasoline are recommended. Cleaning agents based on water are not allowed. Ultrasonic cleaning methods are permissible. 5 Storage In order to maintain their solderability, thermistors must be stored in a non-corrosive atmosphere. Humidity, temperature and container materials are critical factors. The components should be left in the original packing. Touching the metallization of unsoldered thermistors may change their soldering properties. 25 °C up to 45 °C Storage temperature: Max. relative humidity (without condensation):